As Enlil already pointed out, the problem is that the s/// and qr// operators don't take the same options. A quick consultation with the Camel book reveals that the qr// operator only accepts modifiers from the set "ismxo".

Another approach you could consider is to use a hash instead of a list, with the keys being the regex as you already use, and the value being true or false (1 or 0) depending on whether you want global matching or not. Not elegant, but it works.


use strict;

sub make_regex_list{
  my %regexes;
  foreach my $strings (@_) {
    my($regex_string,$options)=@$strings;
    if ($options =~ /g/) {
      $regexes{qr/(?$options)$regex_string/} = 1;
    } else {
      $regexes{qr/(?$options)$regex_string/} = 0;
    }
  }
  return %regexes;
}

my $string = "Jack Jack John";
# in real code this array would be constructed
# from a file
my @reStrings = (["jack","ig"],["john","i"]);
my %regexes = make_regex_list(@reStrings);
foreach my $regex (keys %regexes) {
  if ($regexes{$regex}) {
    print "Using $regex in global mode\n";
    $string =~ s/$regex/name/g;
    print $string."\n";
  } else {
    print "Using $regex\n";
    $string =~ s/$regex/name/;
    print $string."\n";
  }
}

[download]

Results in,

Using (?-xism:(?i)john)
Jack Jack name
Using (?-xism:(?ig)jack) in global mode
name name name

[download]


PCS

In reply to Re: Constructing a list of regexes by webengr
in thread Constructing a list of regexes by fletcher_the_dog

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.